Your SS $ will not be taxable in Thailand, but other money brought into Thailand will be taxable, albeit deminimus. However, taxes you pay in Thailand can be credited against US taxes. Confused yet? However if you live in Thailand less that 180 days per year, no Thai income tax. Between living in Thailand and working in the US, travel, immigration and accounting fees will not bode well for you unless you have a very wealthy Thai girlfriend which I have not yet found in 20 years.
Worldwide banking fraud, not just Thailand. In the USA there is a big deal with KYC...know your client/customer.Everyone wants ID and fixed address, ad nauseam. Too bad about BKK Bank. They just got hit hard.